stoyanovgeorge

#!/bin/bash

if [[ "$var" =~ ^-?[0-9]+$ ]];then
        echo "integer"
else
        echo "not integer"
fi

stoyanovgeorge

#!/bin/bash

# check if the $1 is empty
if [[ -z "$1" ]];then
    printf "Please define the IP or the hostname which you want to check!\nUsage: ./script.sh 192.168.1.1\n" 
else
    if ping -c 1 "$1" &> /dev/null;then
        printf "%s is UP!\n" "$1"
    else
        printf "%s is DOWN!\n" "$1"

stoyanovgeorge

#!/bin/bash

range=500
number=$RANDOM
let "number %= $range"
printf "Random number less than %s - %s\n" "$range" "$number"